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These Thyristor Surge Protective Devices (TSPD) prevent overvoltage damage to sensitive circuits by lightning, induction and power line crossings. They are breakover-triggered crowbar protectors. Turn-off occurs when the surge current falls below the holding current value.
Secondary protection applications for electronic telecom equipment at customer premises.
MMT08B064T3 Maximum Ratings
Rating
Symbol
Value
Unit
Off-State Voltage - Maximum
VDM
58
V
Maximum Pulse Surge Short Circuit Current Non-Repetitive Double Exponential Decay Waveform (-25 Initial Temperature) (Notes 1 and 2) 2 x 10 sec 8 x 20 sec 10 x 160 sec 10 x 360 sec 10 x 560 sec 10 x 700 sec 10 x 1000 sec
IPPS1 IPPS2 IPPS3 IPPS4 IPPS5 IPPS6 IPPS7
±250 ±250 ±150 ±150 ±100 ±100 ±80
A(pk)
Nonrepetitive Peak On-State Current 60 Hz Full Sign Wave
ITSM
32
A(pk)
Maximum Nonrepetitive Rate of Change of On-State Current Exponential Waveform, <100 A
di/dt
150
A/s
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. ` Allow cooling before testing second polarity. ` Measured under pulse conditions to reduce heating.
MMT08B064T3 Features
· High Surge Current Capability: 80 A 10 x 1000 sec, for Controlled Temperature Environments · The MMT08B064T3 is used to help equipment meet various regulatory requirements including: Bellcore 1089, ITU K.20 & K.21, IEC 950, UL 1459 & 1950 and FCC Part 68. · Bidirectional Protection in a Single Device · Little Change of Voltage Limit with Transient Amplitude or Rate · Freedom from Wearout Mechanisms Present in Non-Semiconductor Devices · Fail-Safe, Shorts When Overstressed, Preventing Continued Unprotected Operation · Surface Mount Technology (SMT) · Indicates UL Recognized - File #E210057 · Device Marking: MMT08B064T3: RPCC